1642904040 has 64 divisors (see below), whose sum is σ = 4937549760. Its totient is φ = 437322240.

The previous prime is 1642904023. The next prime is 1642904051. The reversal of 1642904040 is 404092461.

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

It is a junction number, because it is equal to n+sod(n) for n = 1642903989 and 1642904007.

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 15 ways as a sum of consecutive naturals, for example, 56532 + ... + 80508.

It is an arithmetic number, because the mean of its divisors is an integer number (77149215).

Almost surely, 2^1642904040 is an apocalyptic number.

1642904040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642904040 is an abundant number, since it is smaller than the sum of its proper divisors (3294645720).

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

1642904040 is a wasteful number, since it uses less digits than its factorization.

1642904040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24562 (or 24558 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1642904040 is about 40532.7526822445. The cubic root of 1642904040 is about 1179.9693662449.

The spelling of 1642904040 in words is "one billion, six hundred forty-two million, nine hundred four thousand, forty".