38309445 has 12 divisors (see below), whose sum is σ = 66403116. Its totient is φ = 20431680.

The previous prime is 38309441. The next prime is 38309473. The reversal of 38309445 is 54490383.

It can be written as a sum of positive squares in 2 ways, for example, as 12574116 + 25735329 = 3546^2 + 5073^2 .

It is not a de Polignac number, because 38309445 - 2² = 38309441 is a prime.

It is a super-2 number, since 2×38309445² = 2935227152416050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38309441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425616 + ... + 425705.

It is an arithmetic number, because the mean of its divisors is an integer number (5533593).

Almost surely, 2^38309445 is an apocalyptic number.

It is an amenable number.

38309445 is a deficient number, since it is larger than the sum of its proper divisors (28093671).

38309445 is a wasteful number, since it uses less digits than its factorization.

38309445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851332 (or 851329 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 38309445 is about 6189.4624160746. The cubic root of 38309445 is about 337.1076593106.

The spelling of 38309445 in words is "thirty-eight million, three hundred nine thousand, four hundred forty-five".