78014440 has 32 divisors (see below), whose sum is σ = 200609280. Its totient is φ = 26747712.

The previous prime is 78014429. The next prime is 78014471. The reversal of 78014440 is 4441087.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 78014399 and 78014408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139032 + ... + 139591.

It is an arithmetic number, because the mean of its divisors is an integer number (6269040).

Almost surely, 2^78014440 is an apocalyptic number.

78014440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78014440 is an abundant number, since it is smaller than the sum of its proper divisors (122594840).

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

78014440 is a wasteful number, since it uses less digits than its factorization.

78014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278641 (or 278637 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 78014440 is about 8832.5783325142. The cubic root of 78014440 is about 427.2922328640.

The spelling of 78014440 in words is "seventy-eight million, fourteen thousand, four hundred forty".