149857790 has 48 divisors (see below), whose sum is σ = 283709088. Its totient is φ = 56982912.

The previous prime is 149857753. The next prime is 149857853. The reversal of 149857790 is 97758941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 866144 + ... + 866316.

It is an arithmetic number, because the mean of its divisors is an integer number (5910606).

Almost surely, 2^149857790 is an apocalyptic number.

149857790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149857790 is a deficient number, since it is larger than the sum of its proper divisors (133851298).

149857790 is a wasteful number, since it uses less digits than its factorization.

149857790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 149857790 is about 12241.6416382771. The cubic root of 149857790 is about 531.1613196382.

The spelling of 149857790 in words is "one hundred forty-nine million, eight hundred fifty-seven thousand, seven hundred ninety".