1406511990 has 48 divisors (see below), whose sum is σ = 3938236848. Its totient is φ = 346218048.

The previous prime is 1406511979. The next prime is 1406512013. The reversal of 1406511990 is 991156041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 599904 + ... + 602243.

It is an arithmetic number, because the mean of its divisors is an integer number (82046601).

Almost surely, 2^1406511990 is an apocalyptic number.

1406511990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1406511990 is an abundant number, since it is smaller than the sum of its proper divisors (2531724858).

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

1406511990 is a wasteful number, since it uses less digits than its factorization.

1406511990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202173 (or 1202170 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1406511990 is about 37503.4930373159. The cubic root of 1406511990 is about 1120.4207576215.

The spelling of 1406511990 in words is "one billion, four hundred six million, five hundred eleven thousand, nine hundred ninety".