1630253720 has 32 divisors (see below), whose sum is σ = 3719740320. Its totient is φ = 642915840.

The previous prime is 1630253693. The next prime is 1630253747. The reversal of 1630253720 is 273520361.

It is an interprime number because it is at equal distance from previous prime (1630253693) and next prime (1630253747).

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, 284177 + ... + 289856.

It is an arithmetic number, because the mean of its divisors is an integer number (116241885).

Almost surely, 2^1630253720 is an apocalyptic number.

1630253720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630253720 is an abundant number, since it is smaller than the sum of its proper divisors (2089486600).

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

1630253720 is a wasteful number, since it uses less digits than its factorization.

1630253720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574115 (or 574111 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 1630253720 is about 40376.4005329846. The cubic root of 1630253720 is about 1176.9329812968.

The spelling of 1630253720 in words is "one billion, six hundred thirty million, two hundred fifty-three thousand, seven hundred twenty".