149199840 has 96 divisors (see below), whose sum is σ = 522214560. Its totient is φ = 39785472.

The previous prime is 149199811. The next prime is 149199847. The reversal of 149199840 is 48991941.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149199847) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12949 + ... + 21588.

It is an arithmetic number, because the mean of its divisors is an integer number (5439735).

Almost surely, 2^149199840 is an apocalyptic number.

149199840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149199840 is an abundant number, since it is smaller than the sum of its proper divisors (373014720).

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

149199840 is a wasteful number, since it uses less digits than its factorization.

149199840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34561 (or 34547 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 149199840 is about 12214.7386382190. The cubic root of 149199840 is about 530.3828253483.

The spelling of 149199840 in words is "one hundred forty-nine million, one hundred ninety-nine thousand, eight hundred forty".