31383480 has 32 divisors (see below), whose sum is σ = 94150800. Its totient is φ = 8368896.

The previous prime is 31383467. The next prime is 31383487. The reversal of 31383480 is 8438313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31383487) 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, 130645 + ... + 130884.

Almost surely, 2^31383480 is an apocalyptic number.

31383480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31383480 is an abundant number, since it is smaller than the sum of its proper divisors (62767320).

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

31383480 is a wasteful number, since it uses less digits than its factorization.

31383480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261543 (or 261539 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 31383480 is about 5602.0960363064. The cubic root of 31383480 is about 315.4280901645.

The spelling of 31383480 in words is "thirty-one million, three hundred eighty-three thousand, four hundred eighty".