78125574 has 64 divisors (see below), whose sum is σ = 172302336. Its totient is φ = 23514624.

The previous prime is 78125569. The next prime is 78125581. The reversal of 78125574 is 47552187.

It is a super-2 number, since 2×78125574² = 12207210625658952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479217 + ... + 479379.

It is an arithmetic number, because the mean of its divisors is an integer number (2692224).

Almost surely, 2^78125574 is an apocalyptic number.

78125574 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

78125574 is an abundant number, since it is smaller than the sum of its proper divisors (94176762).

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

78125574 is a wasteful number, since it uses less digits than its factorization.

78125574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 78400, while the sum is 39.

The square root of 78125574 is about 8838.8672351156. The cubic root of 78125574 is about 427.4950336279.

The spelling of 78125574 in words is "seventy-eight million, one hundred twenty-five thousand, five hundred seventy-four".