402242644620 has 36 divisors (see below), whose sum is σ = 1220136022560. Its totient is φ = 107264705184.

The previous prime is 402242644619. The next prime is 402242644669. The reversal of 402242644620 is 26446242204.

402242644620 is a `hidden beast` number, since 4 + 0 + 2 + 2 + 4 + 2 + 644 + 6 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×402242644620² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117340500 + ... + 1117340859.

Almost surely, 2^402242644620 is an apocalyptic number.

It is an amenable number.

402242644620 is an abundant number, since it is smaller than the sum of its proper divisors (817893377940).

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

402242644620 is a wasteful number, since it uses less digits than its factorization.

402242644620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234681374 (or 2234681369 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

Adding to 402242644620 its reverse (26446242204), we get a palindrome (428688886824).

The spelling of 402242644620 in words is "four hundred two billion, two hundred forty-two million, six hundred forty-four thousand, six hundred twenty".