38711640 has 64 divisors (see below), whose sum is σ = 126696960. Its totient is φ = 9384320.

The previous prime is 38711593. The next prime is 38711693. The reversal of 38711640 is 4611783.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 38711598 and 38711607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13344 + ... + 15983.

It is an arithmetic number, because the mean of its divisors is an integer number (1979640).

Almost surely, 2^38711640 is an apocalyptic number.

38711640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38711640 is an abundant number, since it is smaller than the sum of its proper divisors (87985320).

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

38711640 is a wasteful number, since it uses less digits than its factorization.

38711640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29352 (or 29348 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 38711640 is about 6221.8678867363. The cubic root of 38711640 is about 338.2832726750.

The spelling of 38711640 in words is "thirty-eight million, seven hundred eleven thousand, six hundred forty".