1400042220 has 24 divisors (see below), whose sum is σ = 3920118384. Its totient is φ = 373344576.

The previous prime is 1400042219. The next prime is 1400042239. The reversal of 1400042220 is 222400041.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1400042220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11666959 + ... + 11667078.

It is an arithmetic number, because the mean of its divisors is an integer number (163338266).

Almost surely, 2^1400042220 is an apocalyptic number.

1400042220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400042220 is an abundant number, since it is smaller than the sum of its proper divisors (2520076164).

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

1400042220 is a wasteful number, since it uses less digits than its factorization.

1400042220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23334049 (or 23334047 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1400042220 is about 37417.1380519676. The cubic root of 1400042220 is about 1118.7001874558.

Adding to 1400042220 its reverse (222400041), we get a palindrome (1622442261).

The spelling of 1400042220 in words is "one billion, four hundred million, forty-two thousand, two hundred twenty".