78372485 has 4 divisors (see below), whose sum is σ = 94046988. Its totient is φ = 62697984.

The previous prime is 78372479. The next prime is 78372493. The reversal of 78372485 is 58427387.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33200644 + 45171841 = 5762^2 + 6721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78372485 is a prime.

It is a super-2 number, since 2×78372485² = 12284492810150450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7837244 + ... + 7837253.

It is an arithmetic number, because the mean of its divisors is an integer number (23511747).

Almost surely, 2^78372485 is an apocalyptic number.

It is an amenable number.

78372485 is a deficient number, since it is larger than the sum of its proper divisors (15674503).

78372485 is a wasteful number, since it uses less digits than its factorization.

78372485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15674502.

The product of its digits is 376320, while the sum is 44.

The square root of 78372485 is about 8852.8235608759. The cubic root of 78372485 is about 427.9449171404.

The spelling of 78372485 in words is "seventy-eight million, three hundred seventy-two thousand, four hundred eighty-five".