156491984 has 40 divisors (see below), whose sum is σ = 332309088. Its totient is φ = 70801280.

The previous prime is 156491983. The next prime is 156492019. The reversal of 156491984 is 489194651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156491983) 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, 37994 + ... + 41910.

Almost surely, 2^156491984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156491984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166154544).

156491984 is an abundant number, since it is smaller than the sum of its proper divisors (175817104).

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

156491984 is a wasteful number, since it uses less digits than its factorization.

156491984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163 (or 4157 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 156491984 is about 12509.6756152987. The cubic root of 156491984 is about 538.8865764138.

The spelling of 156491984 in words is "one hundred fifty-six million, four hundred ninety-one thousand, nine hundred eighty-four".