30725190 has 32 divisors (see below), whose sum is σ = 81934560. Its totient is φ = 8193312.

The previous prime is 30725173. The next prime is 30725197. The reversal of 30725190 is 9152703.

It is a super-2 number, since 2×30725190² = 1888074601072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30725197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56629 + ... + 57168.

It is an arithmetic number, because the mean of its divisors is an integer number (2560455).

Almost surely, 2^30725190 is an apocalyptic number.

30725190 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30725190 is an abundant number, since it is smaller than the sum of its proper divisors (51209370).

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

30725190 is a wasteful number, since it uses less digits than its factorization.

30725190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113813 (or 113807 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 30725190 is about 5543.0307594312. The cubic root of 30725190 is about 313.2070475947.

Adding to 30725190 its reverse (9152703), we get a palindrome (39877893).

The spelling of 30725190 in words is "thirty million, seven hundred twenty-five thousand, one hundred ninety".