30131040 has 48 divisors (see below), whose sum is σ = 94914288. Its totient is φ = 8034816.

The previous prime is 30131033. The next prime is 30131041. The reversal of 30131040 is 4013103.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30907 + ... + 31866.

It is an arithmetic number, because the mean of its divisors is an integer number (1977381).

Almost surely, 2^30131040 is an apocalyptic number.

30131040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30131040 is an abundant number, since it is smaller than the sum of its proper divisors (64783248).

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

30131040 is a wasteful number, since it uses less digits than its factorization.

30131040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62791 (or 62783 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30131040 is about 5489.1748013704. The cubic root of 30131040 is about 311.1750065287.

Adding to 30131040 its reverse (4013103), we get a palindrome (34144143).

The spelling of 30131040 in words is "thirty million, one hundred thirty-one thousand, forty".