78042914 has 4 divisors (see below), whose sum is σ = 117064374. Its totient is φ = 39021456.

The previous prime is 78042907. The next prime is 78042931. The reversal of 78042914 is 41924087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78021889 + 21025 = 8833^2 + 145^2 .

It is a super-2 number, since 2×78042914² = 12181392851222792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19510727 + ... + 19510730.

Almost surely, 2^78042914 is an apocalyptic number.

78042914 is a deficient number, since it is larger than the sum of its proper divisors (39021460).

78042914 is a wasteful number, since it uses less digits than its factorization.

78042914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39021459.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 78042914 is about 8834.1900590829. The cubic root of 78042914 is about 427.3442114427.

The spelling of 78042914 in words is "seventy-eight million, forty-two thousand, nine hundred fourteen".