149536890 has 36 divisors (see below), whose sum is σ = 389097774. Its totient is φ = 39845568.

The previous prime is 149536889. The next prime is 149536921. The reversal of 149536890 is 98635941.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 147112641 + 2424249 = 12129^2 + 1557^2 .

It is a super-2 number, since 2×149536890² = 44722562941744200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 115366 + ... + 116654.

Almost surely, 2^149536890 is an apocalyptic number.

149536890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149536890 is an abundant number, since it is smaller than the sum of its proper divisors (239560884).

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

149536890 is an equidigital number, since it uses as much as digits as its factorization.

149536890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 149536890 is about 12228.5277118711. The cubic root of 149536890 is about 530.7819122073.

It can be divided in two parts, 149536 and 890, that added together give a triangular number (150426 = T₅₄₈).

The spelling of 149536890 in words is "one hundred forty-nine million, five hundred thirty-six thousand, eight hundred ninety".