1400021040 has 160 divisors (see below), whose sum is σ = 4940683776. Its totient is φ = 324628480.

The previous prime is 1400020981. The next prime is 1400021053. The reversal of 1400021040 is 401200041.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49192 + ... + 72248.

Almost surely, 2^1400021040 is an apocalyptic number.

1400021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2470341888).

1400021040 is an abundant number, since it is smaller than the sum of its proper divisors (3540662736).

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

1400021040 is a wasteful number, since it uses less digits than its factorization.

1400021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23107 (or 23101 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1400021040 is about 37416.8550255096. The cubic root of 1400021040 is about 1118.6945461522.

Adding to 1400021040 its reverse (401200041), we get a palindrome (1801221081).

The spelling of 1400021040 in words is "one billion, four hundred million, twenty-one thousand, forty".