44155420 has 24 divisors (see below), whose sum is σ = 93346848. Its totient is φ = 17544000.

The previous prime is 44155417. The next prime is 44155421. The reversal of 44155420 is 2455144.

It is a happy number.

It is a super-2 number, since 2×44155420² = 3899402230752800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44155421) 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, 4291 + ... + 10330.

It is an arithmetic number, because the mean of its divisors is an integer number (3889452).

Almost surely, 2^44155420 is an apocalyptic number.

It is an amenable number.

44155420 is an abundant number, since it is smaller than the sum of its proper divisors (49191428).

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

44155420 is a wasteful number, since it uses less digits than its factorization.

44155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14781 (or 14779 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 44155420 is about 6644.9544768945. The cubic root of 44155420 is about 353.4500168402.

The spelling of 44155420 in words is "forty-four million, one hundred fifty-five thousand, four hundred twenty".