1642288990 has 8 divisors (see below), whose sum is σ = 2956120200. Its totient is φ = 656915592.

The previous prime is 1642288933. The next prime is 1642289017. The reversal of 1642288990 is 998822461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1642288990² = 5394226253350440200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82114440 + ... + 82114459.

It is an arithmetic number, because the mean of its divisors is an integer number (369515025).

Almost surely, 2^1642288990 is an apocalyptic number.

1642288990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642288990 is a deficient number, since it is larger than the sum of its proper divisors (1313831210).

1642288990 is a wasteful number, since it uses less digits than its factorization.

1642288990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164228906.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1642288990 is about 40525.1648978755. The cubic root of 1642288990 is about 1179.8221004431.

The spelling of 1642288990 in words is "one billion, six hundred forty-two million, two hundred eighty-eight thousand, nine hundred ninety".