1080631990 has 32 divisors (see below), whose sum is σ = 2040246144. Its totient is φ = 411615360.

The previous prime is 1080631967. The next prime is 1080631991. The reversal of 1080631990 is 991360801.

It is a super-2 number, since 2×1080631990² = 2335530995622720200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080631991) 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, 13681 + ... + 48460.

It is an arithmetic number, because the mean of its divisors is an integer number (63757692).

Almost surely, 2^1080631990 is an apocalyptic number.

1080631990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1080631990 is a deficient number, since it is larger than the sum of its proper divisors (959614154).

1080631990 is a wasteful number, since it uses less digits than its factorization.

1080631990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62232.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1080631990 is about 32872.9674656852. The cubic root of 1080631990 is about 1026.1856563337.

The spelling of 1080631990 in words is "one billion, eighty million, six hundred thirty-one thousand, nine hundred ninety".