1400396020 has 24 divisors (see below), whose sum is σ = 3003404544. Its totient is φ = 548239776.

The previous prime is 1400395999. The next prime is 1400396021. The reversal of 1400396020 is 206930041.

It is a super-2 number, since 2×1400396020² = 3922218025663680800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400396021) 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, 743952 + ... + 745831.

It is an arithmetic number, because the mean of its divisors is an integer number (125141856).

Almost surely, 2^1400396020 is an apocalyptic number.

1400396020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400396020 is an abundant number, since it is smaller than the sum of its proper divisors (1603008524).

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

1400396020 is a wasteful number, since it uses less digits than its factorization.

1400396020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489839 (or 1489837 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1400396020 is about 37421.8655334017. The cubic root of 1400396020 is about 1118.7944138501.

The spelling of 1400396020 in words is "one billion, four hundred million, three hundred ninety-six thousand, twenty".