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197426920 = 2358955457
BaseRepresentation
bin10111100010001…
…11111011101000
3111202111022211011
423301013323220
5401020130140
631331313304
74615046455
oct1361077350
9452438734
10197426920
11a1495849
125614b834
1331b96082
141c31282c
15124ebcea
hexbc47ee8

197426920 has 32 divisors (see below), whose sum is σ = 449209800. Its totient is φ = 78082048.

The previous prime is 197426903. The next prime is 197426939. The reversal of 197426920 is 29624791.

It can be written as a sum of positive squares in 4 ways, for example, as 56340036 + 141086884 = 7506^2 + 11878^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24169 + ... + 31288.

Almost surely, 2197426920 is an apocalyptic number.

197426920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197426920 is an abundant number, since it is smaller than the sum of its proper divisors (251782880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197426920 is a wasteful number, since it uses less digits than its factorization.

197426920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55557 (or 55553 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 197426920 is about 14050.8690122711. The cubic root of 197426920 is about 582.2848044943.

It can be divided in two parts, 19742 and 6920, that added together give a palindrome (26662).

The spelling of 197426920 in words is "one hundred ninety-seven million, four hundred twenty-six thousand, nine hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 89 178 356 445 712 890 1780 3560 55457 110914 221828 277285 443656 554570 1109140 2218280 4935673 9871346 19742692 24678365 39485384 49356730 98713460 197426920