78427632 has 40 divisors (see below), whose sum is σ = 203000400. Its totient is φ = 26091520.

The previous prime is 78427627. The next prime is 78427633. The reversal of 78427632 is 23672487.

It is a super-2 number, since 2×78427632² = 12301786922254848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78427633) 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, 29494 + ... + 32042.

It is an arithmetic number, because the mean of its divisors is an integer number (5075010).

Almost surely, 2^78427632 is an apocalyptic number.

It is an amenable number.

78427632 is an abundant number, since it is smaller than the sum of its proper divisors (124572768).

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

78427632 is a wasteful number, since it uses less digits than its factorization.

78427632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201 (or 3195 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 78427632 is about 8855.9376691573. The cubic root of 78427632 is about 428.0452684527.

The spelling of 78427632 in words is "seventy-eight million, four hundred twenty-seven thousand, six hundred thirty-two".