7720022040 has 32 divisors (see below), whose sum is σ = 23160066480. Its totient is φ = 2058672512.

The previous prime is 7720022033. The next prime is 7720022077. The reversal of 7720022040 is 402200277.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 7720022040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32166639 + ... + 32166878.

Almost surely, 2^7720022040 is an apocalyptic number.

It is an amenable number.

7720022040 is an abundant number, since it is smaller than the sum of its proper divisors (15440044440).

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

7720022040 is a wasteful number, since it uses less digits than its factorization.

7720022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64333531 (or 64333527 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 7720022040 is about 87863.6559676411. The cubic root of 7720022040 is about 1976.3909052780.

The spelling of 7720022040 in words is "seven billion, seven hundred twenty million, twenty-two thousand, forty".