1400664620 has 48 divisors (see below), whose sum is σ = 3050308800. Its totient is φ = 539616000.

The previous prime is 1400664619. The next prime is 1400664647. The reversal of 1400664620 is 264660041.

It is a super-2 number, since 2×1400664620² = 3923722755439488800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251870 + ... + 257370.

It is an arithmetic number, because the mean of its divisors is an integer number (63548100).

Almost surely, 2^1400664620 is an apocalyptic number.

1400664620 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 1400664620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525154400).

1400664620 is an abundant number, since it is smaller than the sum of its proper divisors (1649644180).

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

1400664620 is a wasteful number, since it uses less digits than its factorization.

1400664620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978 (or 5976 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1400664620 is about 37425.4541722609. The cubic root of 1400664620 is about 1118.8659386104.

The spelling of 1400664620 in words is "one billion, four hundred million, six hundred sixty-four thousand, six hundred twenty".