252022640 has 40 divisors (see below), whose sum is σ = 593384640. Its totient is φ = 99530496.

The previous prime is 252022627. The next prime is 252022663. The reversal of 252022640 is 46220252.

252022640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×252022640² = 127030822145139200, which contains 22 as substring.

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, 13619 + ... + 26258.

It is an arithmetic number, because the mean of its divisors is an integer number (14834616).

Almost surely, 2^252022640 is an apocalyptic number.

252022640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252022640 is an abundant number, since it is smaller than the sum of its proper divisors (341362000).

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

252022640 is a wasteful number, since it uses less digits than its factorization.

252022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39969 (or 39963 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 252022640 is about 15875.2209433444. The cubic root of 252022640 is about 631.6548748581.

Adding to 252022640 its reverse (46220252), we get a palindrome (298242892).

The spelling of 252022640 in words is "two hundred fifty-two million, twenty-two thousand, six hundred forty".