78374442 has 16 divisors (see below), whose sum is σ = 157066560. Its totient is φ = 26071872.

The previous prime is 78374441. The next prime is 78374477. The reversal of 78374442 is 24447387.

It is a super-2 number, since 2×78374442² = 12285106317622728, 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 78374442.

It is not an unprimeable number, because it can be changed into a prime (78374441) 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, 9967 + ... + 16002.

It is an arithmetic number, because the mean of its divisors is an integer number (9816660).

Almost surely, 2^78374442 is an apocalyptic number.

78374442 is an abundant number, since it is smaller than the sum of its proper divisors (78692118).

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

78374442 is a wasteful number, since it uses less digits than its factorization.

78374442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26477.

The product of its digits is 150528, while the sum is 39.

The square root of 78374442 is about 8852.9340898936. The cubic root of 78374442 is about 427.9484791100.

The spelling of 78374442 in words is "seventy-eight million, three hundred seventy-four thousand, four hundred forty-two".