1400445400 has 24 divisors (see below), whose sum is σ = 3256036020. Its totient is φ = 560178080.

The previous prime is 1400445391. The next prime is 1400445437. The reversal of 1400445400 is 45440041.

It is a super-2 number, since 2×1400445400² = 3922494636762320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3500914 + ... + 3501313.

Almost surely, 2^1400445400 is an apocalyptic number.

1400445400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400445400 is an abundant number, since it is smaller than the sum of its proper divisors (1855590620).

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

1400445400 is a wasteful number, since it uses less digits than its factorization.

1400445400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002243 (or 7002234 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1400445400 is about 37422.5253022828. The cubic root of 1400445400 is about 1118.8075638015.

Adding to 1400445400 its reverse (45440041), we get a palindrome (1445885441).

The spelling of 1400445400 in words is "one billion, four hundred million, four hundred forty-five thousand, four hundred".