78533770 has 48 divisors (see below), whose sum is σ = 166507488. Its totient is φ = 26587680.

The previous prime is 78533759. The next prime is 78533771. The reversal of 78533770 is 7733587.

It is not an unprimeable number, because it can be changed into a prime (78533771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39705 + ... + 41635.

It is an arithmetic number, because the mean of its divisors is an integer number (3468906).

Almost surely, 2^78533770 is an apocalyptic number.

78533770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78533770 is an abundant number, since it is smaller than the sum of its proper divisors (87973718).

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

78533770 is a wasteful number, since it uses less digits than its factorization.

78533770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 78533770 is about 8861.9281197717. The cubic root of 78533770 is about 428.2382760626.

The spelling of 78533770 in words is "seventy-eight million, five hundred thirty-three thousand, seven hundred seventy".