149402640 has 160 divisors (see below), whose sum is σ = 490254336. Its totient is φ = 37578240.

The previous prime is 149402639. The next prime is 149402663. The reversal of 149402640 is 46204941.

It is a super-2 number, since 2×149402640² = 44642297677939200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 149402598 and 149402607.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319687 + ... + 320153.

Almost surely, 2^149402640 is an apocalyptic number.

149402640 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 149402640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245127168).

149402640 is an abundant number, since it is smaller than the sum of its proper divisors (340851696).

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

149402640 is a wasteful number, since it uses less digits than its factorization.

149402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 149402640 is about 12223.0372657535. The cubic root of 149402640 is about 530.6230243086.

The spelling of 149402640 in words is "one hundred forty-nine million, four hundred two thousand, six hundred forty".