78388374 has 16 divisors (see below), whose sum is σ = 156864960. Its totient is φ = 26114760.

The previous prime is 78388369. The next prime is 78388379. The reversal of 78388374 is 47388387.

It is an interprime number because it is at equal distance from previous prime (78388369) and next prime (78388379).

It is a super-2 number, since 2×78388374² = 12289474356727752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78388379) 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, 15897 + ... + 20235.

It is an arithmetic number, because the mean of its divisors is an integer number (9804060).

Almost surely, 2^78388374 is an apocalyptic number.

78388374 is an abundant number, since it is smaller than the sum of its proper divisors (78476586).

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

78388374 is a wasteful number, since it uses less digits than its factorization.

78388374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355.

The product of its digits is 903168, while the sum is 48.

The square root of 78388374 is about 8853.7209127011. The cubic root of 78388374 is about 427.9738352713.

The spelling of 78388374 in words is "seventy-eight million, three hundred eighty-eight thousand, three hundred seventy-four".