78429975 has 48 divisors (see below), whose sum is σ = 140636832. Its totient is φ = 38338560.

The previous prime is 78429961. The next prime is 78429997. The reversal of 78429975 is 57992487.

It is not a de Polignac number, because 78429975 - 2⁵ = 78429943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 250419 + ... + 250731.

It is an arithmetic number, because the mean of its divisors is an integer number (2929934).

Almost surely, 2^78429975 is an apocalyptic number.

78429975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78429975 is a deficient number, since it is larger than the sum of its proper divisors (62206857).

78429975 is a wasteful number, since it uses less digits than its factorization.

78429975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 591 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 78429975 is about 8856.0699522983. The cubic root of 78429975 is about 428.0495309813.

The spelling of 78429975 in words is "seventy-eight million, four hundred twenty-nine thousand, nine hundred seventy-five".