1550431944 has 48 divisors (see below), whose sum is σ = 4201551900. Its totient is φ = 516507264.

The previous prime is 1550431919. The next prime is 1550431963. The reversal of 1550431944 is 4491340551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 873911844 + 676520100 = 29562^2 + 26010^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1550431899 and 1550431908.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140782 + ... + 151394.

Almost surely, 2^1550431944 is an apocalyptic number.

It is an amenable number.

1550431944 is an abundant number, since it is smaller than the sum of its proper divisors (2651119956).

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

1550431944 is a wasteful number, since it uses less digits than its factorization.

1550431944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12654 (or 12647 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1550431944 is about 39375.5246822185. The cubic root of 1550431944 is about 1157.4020197359.

The spelling of 1550431944 in words is "one billion, five hundred fifty million, four hundred thirty-one thousand, nine hundred forty-four".