149805420 has 24 divisors (see below), whose sum is σ = 419455344. Its totient is φ = 39948096.

The previous prime is 149805419. The next prime is 149805427. The reversal of 149805420 is 24508941.

It is a super-2 number, since 2×149805420² = 44883327722752800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149805427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248319 + ... + 1248438.

It is an arithmetic number, because the mean of its divisors is an integer number (17477306).

Almost surely, 2^149805420 is an apocalyptic number.

149805420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149805420 is an abundant number, since it is smaller than the sum of its proper divisors (269649924).

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

149805420 is a wasteful number, since it uses less digits than its factorization.

149805420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496769 (or 2496767 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 149805420 is about 12239.5024408674. The cubic root of 149805420 is about 531.0994383945.

The spelling of 149805420 in words is "one hundred forty-nine million, eight hundred five thousand, four hundred twenty".