1402311640 has 32 divisors (see below), whose sum is σ = 3340802880. Its totient is φ = 527928832.

The previous prime is 1402311619. The next prime is 1402311641. The reversal of 1402311640 is 461132041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402311641) 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, 1030432 + ... + 1031791.

It is an arithmetic number, because the mean of its divisors is an integer number (104400090).

Almost surely, 2^1402311640 is an apocalyptic number.

1402311640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402311640 is an abundant number, since it is smaller than the sum of its proper divisors (1938491240).

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

1402311640 is a wasteful number, since it uses less digits than its factorization.

1402311640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062251 (or 2062247 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1402311640 is about 37447.4517157042. The cubic root of 1402311640 is about 1119.3043192474.

Adding to 1402311640 its reverse (461132041), we get a palindrome (1863443681).

The spelling of 1402311640 in words is "one billion, four hundred two million, three hundred eleven thousand, six hundred forty".