78421014 has 32 divisors (see below), whose sum is σ = 199165440. Its totient is φ = 22405896.

The previous prime is 78420989. The next prime is 78421033. The reversal of 78421014 is 41012487.

It is a super-2 number, since 2×78421014² = 12299710873576392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103354 + ... + 104109.

It is an arithmetic number, because the mean of its divisors is an integer number (6223920).

Almost surely, 2^78421014 is an apocalyptic number.

78421014 is an abundant number, since it is smaller than the sum of its proper divisors (120744426).

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

78421014 is a wasteful number, since it uses less digits than its factorization.

78421014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207481 (or 207475 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 78421014 is about 8855.5640136583. The cubic root of 78421014 is about 428.0332281245.

The spelling of 78421014 in words is "seventy-eight million, four hundred twenty-one thousand, fourteen".