1631042928 has 60 divisors (see below), whose sum is σ = 4711914688. Its totient is φ = 526141440.

The previous prime is 1631042899. The next prime is 1631042971. The reversal of 1631042928 is 8292401361.

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 = 1631042892 and 1631042901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178225 + ... + 187152.

Almost surely, 2^1631042928 is an apocalyptic number.

1631042928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1631042928 is an abundant number, since it is smaller than the sum of its proper divisors (3080871760).

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

1631042928 is a wasteful number, since it uses less digits than its factorization.

1631042928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365422 (or 365413 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1631042928 is about 40386.1724851464. The cubic root of 1631042928 is about 1177.1228689338.

The spelling of 1631042928 in words is "one billion, six hundred thirty-one million, forty-two thousand, nine hundred twenty-eight".