162990728 has 8 divisors (see below), whose sum is σ = 305607630. Its totient is φ = 81495360.

The previous prime is 162990727. The next prime is 162990743. The reversal of 162990728 is 827099261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 33895684 = 11362^2 + 5822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (162990727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186913 + ... + 10186928.

Almost surely, 2^162990728 is an apocalyptic number.

It is an amenable number.

162990728 is a deficient number, since it is larger than the sum of its proper divisors (142616902).

162990728 is a wasteful number, since it uses less digits than its factorization.

162990728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20373847 (or 20373843 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 162990728 is about 12766.7822100951. The cubic root of 162990728 is about 546.2451993008.

The spelling of 162990728 in words is "one hundred sixty-two million, nine hundred ninety thousand, seven hundred twenty-eight".