149249646 has 144 divisors (see below), whose sum is σ = 412004736. Its totient is φ = 38211264.

The previous prime is 149249641. The next prime is 149249651. The reversal of 149249646 is 646942941.

It is an interprime number because it is at equal distance from previous prime (149249641) and next prime (149249651).

It is a super-2 number, since 2×149249646² = 44550913662250632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149249641) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 915561 + ... + 915723.

It is an arithmetic number, because the mean of its divisors is an integer number (2861144).

Almost surely, 2^149249646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149249646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206002368).

149249646 is an abundant number, since it is smaller than the sum of its proper divisors (262755090).

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

149249646 is a wasteful number, since it uses less digits than its factorization.

149249646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 231 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 149249646 is about 12216.7772346065. Note that the first 3 decimals coincide. The cubic root of 149249646 is about 530.4418363770.

The spelling of 149249646 in words is "one hundred forty-nine million, two hundred forty-nine thousand, six hundred forty-six".