1601690442 has 16 divisors (see below), whose sum is σ = 3494597472. Its totient is φ = 485360720.

The previous prime is 1601690437. The next prime is 1601690449. The reversal of 1601690442 is 2440961061.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1601690449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12133953 + ... + 12134084.

It is an arithmetic number, because the mean of its divisors is an integer number (218412342).

Almost surely, 2^1601690442 is an apocalyptic number.

1601690442 is an abundant number, since it is smaller than the sum of its proper divisors (1892907030).

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

1601690442 is a wasteful number, since it uses less digits than its factorization.

1601690442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268053.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1601690442 is about 40021.1249467078. The cubic root of 1601690442 is about 1170.0188571729.

The spelling of 1601690442 in words is "one billion, six hundred one million, six hundred ninety thousand, four hundred forty-two".