31488090 has 16 divisors (see below), whose sum is σ = 75571488. Its totient is φ = 8396816.

The previous prime is 31488089. The next prime is 31488091. The reversal of 31488090 is 9088413.

It is an interprime number because it is at equal distance from previous prime (31488089) and next prime (31488091).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (31488091) 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, 524772 + ... + 524831.

It is an arithmetic number, because the mean of its divisors is an integer number (4723218).

Almost surely, 2^31488090 is an apocalyptic number.

31488090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31488090 is an abundant number, since it is smaller than the sum of its proper divisors (44083398).

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

31488090 is a wasteful number, since it uses less digits than its factorization.

31488090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049613.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 31488090 is about 5611.4249527192. The cubic root of 31488090 is about 315.7781717739.

The spelling of 31488090 in words is "thirty-one million, four hundred eighty-eight thousand, ninety".