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389975040 = 21033571331
BaseRepresentation
bin10111001111101…
…000110000000000
31000011210210012000
4113033220300000
51244313200130
6102410304000
712443506320
oct2717506000
91004723160
10389975040
11190149024
12aa728000
1362a41580
1439b15280
1524383260
hex173e8c00

389975040 has 704 divisors, whose sum is σ = 1760747520. Its totient is φ = 79626240.

The previous prime is 389975023. The next prime is 389975059. The reversal of 389975040 is 40579983.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12579825 + ... + 12579855.

Almost surely, 2389975040 is an apocalyptic number.

389975040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389975040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880373760).

389975040 is an abundant number, since it is smaller than the sum of its proper divisors (1370772480).

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

389975040 is a wasteful number, since it uses less digits than its factorization.

389975040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 389975040 is about 19747.7856986549. The cubic root of 389975040 is about 730.5987706341.

The spelling of 389975040 in words is "three hundred eighty-nine million, nine hundred seventy-five thousand, forty".