149238840 has 64 divisors (see below), whose sum is σ = 449285760. Its totient is φ = 39657600.

The previous prime is 149238829. The next prime is 149238851. The reversal of 149238840 is 48832941.

It is an interprime number because it is at equal distance from previous prime (149238829) and next prime (149238851).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34815 + ... + 38865.

It is an arithmetic number, because the mean of its divisors is an integer number (7020090).

Almost surely, 2^149238840 is an apocalyptic number.

149238840 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 149238840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224642880).

149238840 is an abundant number, since it is smaller than the sum of its proper divisors (300046920).

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

149238840 is a wasteful number, since it uses less digits than its factorization.

149238840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372 (or 4368 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 149238840 is about 12216.3349659380. The cubic root of 149238840 is about 530.4290343526.

The spelling of 149238840 in words is "one hundred forty-nine million, two hundred thirty-eight thousand, eight hundred forty".