78650420 has 12 divisors (see below), whose sum is σ = 165165924. Its totient is φ = 31460160.

The previous prime is 78650399. The next prime is 78650437. The reversal of 78650420 is 2405687.

It can be written as a sum of positive squares in 2 ways, for example, as 48135844 + 30514576 = 6938^2 + 5524^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 1966241 + ... + 1966280.

It is an arithmetic number, because the mean of its divisors is an integer number (13763827).

Almost surely, 2^78650420 is an apocalyptic number.

It is an amenable number.

78650420 is an abundant number, since it is smaller than the sum of its proper divisors (86515504).

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

78650420 is a wasteful number, since it uses less digits than its factorization.

78650420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932530 (or 3932528 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 78650420 is about 8868.5072024552. The cubic root of 78650420 is about 428.4501988327.

The spelling of 78650420 in words is "seventy-eight million, six hundred fifty thousand, four hundred twenty".