1400121800 has 96 divisors (see below), whose sum is σ = 4058579520. Its totient is φ = 436396800.

The previous prime is 1400121763. The next prime is 1400121809. The reversal of 1400121800 is 81210041.

It is not an unprimeable number, because it can be changed into a prime (1400121809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30059 + ... + 60858.

It is an arithmetic number, because the mean of its divisors is an integer number (42276870).

Almost surely, 2^1400121800 is an apocalyptic number.

1400121800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400121800 is an abundant number, since it is smaller than the sum of its proper divisors (2658457720).

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

1400121800 is a wasteful number, since it uses less digits than its factorization.

1400121800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90951 (or 90942 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1400121800 is about 37418.2014533034. The cubic root of 1400121800 is about 1118.7213831199.

Adding to 1400121800 its reverse (81210041), we get a palindrome (1481331841).

The spelling of 1400121800 in words is "one billion, four hundred million, one hundred twenty-one thousand, eight hundred".