1016621400 has 48 divisors (see below), whose sum is σ = 3151528200. Its totient is φ = 271098880.

The previous prime is 1016621399. The next prime is 1016621423. The reversal of 1016621400 is 41266101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 846585 + ... + 847784.

Almost surely, 2^1016621400 is an apocalyptic number.

1016621400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1016621400 is an abundant number, since it is smaller than the sum of its proper divisors (2134906800).

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

1016621400 is a wasteful number, since it uses less digits than its factorization.

1016621400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694388 (or 1694379 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1016621400 is about 31884.5009369756. The cubic root of 1016621400 is about 1005.5100502500.

Adding to 1016621400 its reverse (41266101), we get a palindrome (1057887501).

The spelling of 1016621400 in words is "one billion, sixteen million, six hundred twenty-one thousand, four hundred".