149190640 has 80 divisors (see below), whose sum is σ = 370074528. Its totient is φ = 55738368.

The previous prime is 149190617. The next prime is 149190647. The reversal of 149190640 is 46091941.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 149190596 and 149190605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149190647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221344 + ... + 222016.

Almost surely, 2^149190640 is an apocalyptic number.

149190640 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 149190640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185037264).

149190640 is an abundant number, since it is smaller than the sum of its proper divisors (220883888).

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

149190640 is a wasteful number, since it uses less digits than its factorization.

149190640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 149190640 is about 12214.3620381909. The cubic root of 149190640 is about 530.3719235889.

The spelling of 149190640 in words is "one hundred forty-nine million, one hundred ninety thousand, six hundred forty".