1421108990 has 48 divisors (see below), whose sum is σ = 3085441632. Its totient is φ = 461585088.

The previous prime is 1421108989. The next prime is 1421109017. The reversal of 1421108990 is 998011241.

It is a super-2 number, since 2×1421108990² = 4039101522917640200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1421108990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2849 + ... + 53388.

It is an arithmetic number, because the mean of its divisors is an integer number (64280034).

Almost surely, 2^1421108990 is an apocalyptic number.

1421108990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421108990 is an abundant number, since it is smaller than the sum of its proper divisors (1664332642).

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

1421108990 is a wasteful number, since it uses less digits than its factorization.

1421108990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56289 (or 56270 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1421108990 is about 37697.5992604304. The cubic root of 1421108990 is about 1124.2833928476.

The spelling of 1421108990 in words is "one billion, four hundred twenty-one million, one hundred eight thousand, nine hundred ninety".