78053388 has 24 divisors (see below), whose sum is σ = 208142592. Its totient is φ = 22300944.

The previous prime is 78053383. The next prime is 78053389. The reversal of 78053388 is 88335087.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78053383) 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, 464520 + ... + 464687.

It is an arithmetic number, because the mean of its divisors is an integer number (8672608).

Almost surely, 2^78053388 is an apocalyptic number.

It is an amenable number.

78053388 is an abundant number, since it is smaller than the sum of its proper divisors (130089204).

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

78053388 is a wasteful number, since it uses less digits than its factorization.

78053388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929221 (or 929219 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 78053388 is about 8834.7828496234. The cubic root of 78053388 is about 427.3633282884.

The spelling of 78053388 in words is "seventy-eight million, fifty-three thousand, three hundred eighty-eight".