6231990 has 32 divisors (see below), whose sum is σ = 15307776. Its totient is φ = 1622880.

The previous prime is 6231949. The next prime is 6232043. The reversal of 6231990 is 991326.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126 + ... + 3705.

It is an arithmetic number, because the mean of its divisors is an integer number (478368).

Almost surely, 2^6231990 is an apocalyptic number.

6231990 is an abundant number, since it is smaller than the sum of its proper divisors (9075786).

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

6231990 is a wasteful number, since it uses less digits than its factorization.

6231990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 6231990 is about 2496.3954013737. The cubic root of 6231990 is about 184.0244729578.

The spelling of 6231990 in words is "six million, two hundred thirty-one thousand, nine hundred ninety".