1402540400 has 30 divisors (see below), whose sum is σ = 3369604272. Its totient is φ = 561016000.

The previous prime is 1402540367. The next prime is 1402540429. The reversal of 1402540400 is 40452041.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1752776 + ... + 1753575.

Almost surely, 2^1402540400 is an apocalyptic number.

1402540400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402540400 is an abundant number, since it is smaller than the sum of its proper divisors (1967063872).

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

1402540400 is a wasteful number, since it uses less digits than its factorization.

1402540400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506369 (or 3506358 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1402540400 is about 37450.5060045922. The cubic root of 1402540400 is about 1119.3651802160.

Adding to 1402540400 its reverse (40452041), we get a palindrome (1442992441).

The spelling of 1402540400 in words is "one billion, four hundred two million, five hundred forty thousand, four hundred".