78045572 has 48 divisors (see below), whose sum is σ = 159449472. Its totient is φ = 33031680.

The previous prime is 78045557. The next prime is 78045587. The reversal of 78045572 is 27554087.

It is an interprime number because it is at equal distance from previous prime (78045557) and next prime (78045587).

It is a super-2 number, since 2×78045572² = 12182222617614368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76538 + ... + 77550.

It is an arithmetic number, because the mean of its divisors is an integer number (3321864).

Almost surely, 2^78045572 is an apocalyptic number.

It is an amenable number.

78045572 is an abundant number, since it is smaller than the sum of its proper divisors (81403900).

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

78045572 is a wasteful number, since it uses less digits than its factorization.

78045572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 78045572 is about 8834.3404960416. The cubic root of 78045572 is about 427.3490629103.

The spelling of 78045572 in words is "seventy-eight million, forty-five thousand, five hundred seventy-two".