78314442 has 16 divisors (see below), whose sum is σ = 162030240. Its totient is φ = 25204592.

The previous prime is 78314441. The next prime is 78314501. The reversal of 78314442 is 24441387.

It is a super-2 number, since 2×78314442² = 12266303651542728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78314441) 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, 224868 + ... + 225215.

It is an arithmetic number, because the mean of its divisors is an integer number (10126890).

Almost surely, 2^78314442 is an apocalyptic number.

78314442 is an abundant number, since it is smaller than the sum of its proper divisors (83715798).

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

78314442 is a wasteful number, since it uses less digits than its factorization.

78314442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450117.

The product of its digits is 21504, while the sum is 33.

The square root of 78314442 is about 8849.5447340527. The cubic root of 78314442 is about 427.8392450994.

It can be divided in two parts, 783 and 14442, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 78314442 in words is "seventy-eight million, three hundred fourteen thousand, four hundred forty-two".