252420740 has 48 divisors (see below), whose sum is σ = 622762560. Its totient is φ = 84727680.

The previous prime is 252420739. The next prime is 252420827. The reversal of 252420740 is 47024252.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41270 + ... + 46989.

It is an arithmetic number, because the mean of its divisors is an integer number (12974220).

Almost surely, 2^252420740 is an apocalyptic number.

252420740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252420740 is an abundant number, since it is smaller than the sum of its proper divisors (370341820).

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

252420740 is a wasteful number, since it uses less digits than its factorization.

252420740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88292 (or 88290 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 252420740 is about 15887.7544039427. The cubic root of 252420740 is about 631.9872914445.

Adding to 252420740 its reverse (47024252), we get a palindrome (299444992).

The spelling of 252420740 in words is "two hundred fifty-two million, four hundred twenty thousand, seven hundred forty".