253709428 has 24 divisors (see below), whose sum is σ = 537268032. Its totient is φ = 102336384.

The previous prime is 253709419. The next prime is 253709441. The reversal of 253709428 is 824907352.

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, 266026 + ... + 266977.

It is an arithmetic number, because the mean of its divisors is an integer number (22386168).

Almost surely, 2^253709428 is an apocalyptic number.

253709428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

253709428 is an abundant number, since it is smaller than the sum of its proper divisors (283558604).

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

253709428 is a wasteful number, since it uses less digits than its factorization.

253709428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533031 (or 533029 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 253709428 is about 15928.2587874507. The cubic root of 253709428 is about 633.0609649393.

The spelling of 253709428 in words is "two hundred fifty-three million, seven hundred nine thousand, four hundred twenty-eight".