76438731 has 8 divisors (see below), whose sum is σ = 101968704. Its totient is φ = 50933960.

The previous prime is 76438727. The next prime is 76438793. The reversal of 76438731 is 13783467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76438731 - 2² = 76438727 is a prime.

It is a super-2 number, since 2×76438731² = 11685759193780722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76438731.

It is not an unprimeable number, because it can be changed into a prime (76438711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2560 + ... + 12626.

It is an arithmetic number, because the mean of its divisors is an integer number (12746088).

Almost surely, 2^76438731 is an apocalyptic number.

76438731 is a deficient number, since it is larger than the sum of its proper divisors (25529973).

76438731 is a wasteful number, since it uses less digits than its factorization.

76438731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12601.

The product of its digits is 84672, while the sum is 39.

The square root of 76438731 is about 8742.9246250897. The cubic root of 76438731 is about 424.3958770763.

The spelling of 76438731 in words is "seventy-six million, four hundred thirty-eight thousand, seven hundred thirty-one".