1402651540 has 24 divisors (see below), whose sum is σ = 2952389160. Its totient is φ = 559761408.

The previous prime is 1402651493. The next prime is 1402651541. The reversal of 1402651540 is 451562041.

It can be written as a sum of positive squares in 4 ways, for example, as 10316944 + 1392334596 = 3212^2 + 37314^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1402651499 and 1402651508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402651541) 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, 72325 + ... + 89644.

It is an arithmetic number, because the mean of its divisors is an integer number (123016215).

Almost surely, 2^1402651540 is an apocalyptic number.

1402651540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402651540 is an abundant number, since it is smaller than the sum of its proper divisors (1549737620).

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

1402651540 is a wasteful number, since it uses less digits than its factorization.

1402651540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162411 (or 162409 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1402651540 is about 37451.9898002763. The cubic root of 1402651540 is about 1119.3947463186.

The spelling of 1402651540 in words is "one billion, four hundred two million, six hundred fifty-one thousand, five hundred forty".