1406087990 has 32 divisors (see below), whose sum is σ = 2555473536. Its totient is φ = 557015040.

The previous prime is 1406087983. The next prime is 1406088007. The reversal of 1406087990 is 997806041.

It is a Curzon number.

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, 463619 + ... + 466641.

It is an arithmetic number, because the mean of its divisors is an integer number (79858548).

Almost surely, 2^1406087990 is an apocalyptic number.

1406087990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1406087990 is a deficient number, since it is larger than the sum of its proper divisors (1149385546).

1406087990 is a wasteful number, since it uses less digits than its factorization.

1406087990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1406087990 is about 37497.8398044474. The cubic root of 1406087990 is about 1120.3081608457.

The spelling of 1406087990 in words is "one billion, four hundred six million, eighty-seven thousand, nine hundred ninety".