78338938 has 8 divisors (see below), whose sum is σ = 123693120. Its totient is φ = 37107900.

The previous prime is 78338903. The next prime is 78338971. The reversal of 78338938 is 83983387.

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

It is a super-2 number, since 2×78338938² = 12273978413935688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78338891 and 78338900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030738 + ... + 1030813.

It is an arithmetic number, because the mean of its divisors is an integer number (15461640).

Almost surely, 2^78338938 is an apocalyptic number.

78338938 is a deficient number, since it is larger than the sum of its proper divisors (45354182).

78338938 is a wasteful number, since it uses less digits than its factorization.

78338938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061572.

The product of its digits is 870912, while the sum is 49.

The square root of 78338938 is about 8850.9286518421. The cubic root of 78338938 is about 427.8838484418.

The spelling of 78338938 in words is "seventy-eight million, three hundred thirty-eight thousand, nine hundred thirty-eight".