78037881 has 8 divisors (see below), whose sum is σ = 107407104. Its totient is φ = 50346960.

The previous prime is 78037853. The next prime is 78037901. The reversal of 78037881 is 18873087.

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

It is not a de Polignac number, because 78037881 - 2¹⁵ = 78005113 is a prime.

It is a super-2 number, since 2×78037881² = 12179821741940322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78037831) 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, 419466 + ... + 419651.

It is an arithmetic number, because the mean of its divisors is an integer number (13425888).

Almost surely, 2^78037881 is an apocalyptic number.

It is an amenable number.

78037881 is a deficient number, since it is larger than the sum of its proper divisors (29369223).

78037881 is a wasteful number, since it uses less digits than its factorization.

78037881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839151.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 78037881 is about 8833.9051953256. The cubic root of 78037881 is about 427.3350247463.

The spelling of 78037881 in words is "seventy-eight million, thirty-seven thousand, eight hundred eighty-one".