1550190900 has 72 divisors (see below), whose sum is σ = 4749071040. Its totient is φ = 389066240.

The previous prime is 1550190877. The next prime is 1550190907. The reversal of 1550190900 is 90910551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550190907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146880 + ... + 157079.

It is an arithmetic number, because the mean of its divisors is an integer number (65959320).

Almost surely, 2^1550190900 is an apocalyptic number.

1550190900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550190900 is an abundant number, since it is smaller than the sum of its proper divisors (3198880140).

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

1550190900 is a wasteful number, since it uses less digits than its factorization.

1550190900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303993 (or 303986 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 1550190900 is about 39372.4637278390. The cubic root of 1550190900 is about 1157.3420366083.

The spelling of 1550190900 in words is "one billion, five hundred fifty million, one hundred ninety thousand, nine hundred".