78569740 has 12 divisors (see below), whose sum is σ = 164996496. Its totient is φ = 31427888.

The previous prime is 78569737. The next prime is 78569753. The reversal of 78569740 is 4796587.

It is a happy number.

It is a zygodrome in base 6.

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, 1964224 + ... + 1964263.

It is an arithmetic number, because the mean of its divisors is an integer number (13749708).

Almost surely, 2^78569740 is an apocalyptic number.

It is an amenable number.

78569740 is an abundant number, since it is smaller than the sum of its proper divisors (86426756).

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

78569740 is a wasteful number, since it uses less digits than its factorization.

78569740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928496 (or 3928494 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 78569740 is about 8863.9573554931. The cubic root of 78569740 is about 428.3036465805.

The spelling of 78569740 in words is "seventy-eight million, five hundred sixty-nine thousand, seven hundred forty".