78140914 has 4 divisors (see below), whose sum is σ = 117211374. Its totient is φ = 39070456.

The previous prime is 78140903. The next prime is 78140917. The reversal of 78140914 is 41904187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41904187 = 13 ⋅3223399.

It can be written as a sum of positive squares in only one way, i.e., 78021889 + 119025 = 8833^2 + 345^2 .

It is a super-2 number, since 2×78140914² = 12212004881510792, 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 78140914.

It is not an unprimeable number, because it can be changed into a prime (78140917) by changing a digit.

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, 19535227 + ... + 19535230.

Almost surely, 2^78140914 is an apocalyptic number.

78140914 is a deficient number, since it is larger than the sum of its proper divisors (39070460).

78140914 is a wasteful number, since it uses less digits than its factorization.

78140914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39070459.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78140914 is about 8839.7349507777. The cubic root of 78140914 is about 427.5230114262.

The spelling of 78140914 in words is "seventy-eight million, one hundred forty thousand, nine hundred fourteen".