161628078 has 64 divisors (see below), whose sum is σ = 358240320. Its totient is φ = 48384000.

The previous prime is 161628067. The next prime is 161628083. The reversal of 161628078 is 870826161.

It is a super-2 number, since 2×161628078² = 52247271195948168, 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 31 ways as a sum of consecutive naturals, for example, 298488 + ... + 299028.

It is an arithmetic number, because the mean of its divisors is an integer number (5597505).

Almost surely, 2^161628078 is an apocalyptic number.

161628078 is an abundant number, since it is smaller than the sum of its proper divisors (196612242).

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

161628078 is a wasteful number, since it uses less digits than its factorization.

161628078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 161628078 is about 12713.3031899660. The cubic root of 161628078 is about 544.7186809502.

The spelling of 161628078 in words is "one hundred sixty-one million, six hundred twenty-eight thousand, seventy-eight".