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39920949 = 324435661
BaseRepresentation
bin1001100001001…
…0010100110101
32210010012020200
42120102110311
540204432244
63543351113
7663215415
oct230222465
983105220
1039920949
1120597222
1211452499
138369883
145432645
153788669
hex2612535

39920949 has 6 divisors (see below), whose sum is σ = 57663606. Its totient is φ = 26613960.

The previous prime is 39920941. The next prime is 39920953. The reversal of 39920949 is 94902993.

It can be written as a sum of positive squares in only one way, i.e., 26193924 + 13727025 = 5118^2 + 3705^2 .

It is not a de Polignac number, because 39920949 - 23 = 39920941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2217822 + ... + 2217839.

It is an arithmetic number, because the mean of its divisors is an integer number (9610601).

Almost surely, 239920949 is an apocalyptic number.

It is an amenable number.

39920949 is a deficient number, since it is larger than the sum of its proper divisors (17742657).

39920949 is a wasteful number, since it uses less digits than its factorization.

39920949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435667 (or 4435664 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 39920949 is about 6318.3026993015. The cubic root of 39920949 is about 341.7697485781.

The spelling of 39920949 in words is "thirty-nine million, nine hundred twenty thousand, nine hundred forty-nine".

Divisors: 1 3 9 4435661 13306983 39920949