149869980 has 192 divisors, whose sum is σ = 516593280. Its totient is φ = 35831808.

The previous prime is 149869963. The next prime is 149869987. The reversal of 149869980 is 89968941.

149869980 is a `hidden beast` number, since 1 + 498 + 69 + 98 + 0 = 666.

It is a super-2 number, since 2×149869980² = 44922021810400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149869987) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 259452 + ... + 260028.

It is an arithmetic number, because the mean of its divisors is an integer number (2690590).

Almost surely, 2^149869980 is an apocalyptic number.

149869980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149869980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258296640).

149869980 is an abundant number, since it is smaller than the sum of its proper divisors (366723300).

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

149869980 is a wasteful number, since it uses less digits than its factorization.

149869980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 149869980 is about 12242.1395188913. The cubic root of 149869980 is about 531.1757214720.

The spelling of 149869980 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, nine hundred eighty".