149870556 has 72 divisors (see below), whose sum is σ = 435052800. Its totient is φ = 43022880.

The previous prime is 149870551. The next prime is 149870569. The reversal of 149870556 is 655078941.

149870556 is a `hidden beast` number, since 1 + 4 + 98 + 7 + 0 + 556 = 666.

It is a super-2 number, since 2×149870556² = 44922367111498272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149870551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2436 + ... + 17483.

It is an arithmetic number, because the mean of its divisors is an integer number (6042400).

Almost surely, 2^149870556 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 149870556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217526400).

149870556 is an abundant number, since it is smaller than the sum of its proper divisors (285182244).

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

149870556 is a wasteful number, since it uses less digits than its factorization.

149870556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19959 (or 19954 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 149870556 is about 12242.1630441683. The cubic root of 149870556 is about 531.1764019659.

It can be divided in two parts, 149870 and 556, that added together give a triangular number (150426 = T₅₄₈).

The spelling of 149870556 in words is "one hundred forty-nine million, eight hundred seventy thousand, five hundred fifty-six".