161038988 has 24 divisors (see below), whose sum is σ = 308046144. Its totient is φ = 73054800.

The previous prime is 161038957. The next prime is 161038991. The reversal of 161038988 is 889830161.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20723 + ... + 27413.

It is an arithmetic number, because the mean of its divisors is an integer number (12835256).

Almost surely, 2^161038988 is an apocalyptic number.

It is an amenable number.

161038988 is a deficient number, since it is larger than the sum of its proper divisors (147007156).

161038988 is a wasteful number, since it uses less digits than its factorization.

161038988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253 (or 7251 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 161038988 is about 12690.1137898760. The cubic root of 161038988 is about 544.0560919310.

The spelling of 161038988 in words is "one hundred sixty-one million, thirty-eight thousand, nine hundred eighty-eight".