38151945 has 32 divisors (see below), whose sum is σ = 73046400. Its totient is φ = 18781632.

The previous prime is 38151941. The next prime is 38151947. The reversal of 38151945 is 54915183.

It is not a de Polignac number, because 38151945 - 2² = 38151941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38151941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9115 + ... + 12624.

It is an arithmetic number, because the mean of its divisors is an integer number (2282700).

Almost surely, 2^38151945 is an apocalyptic number.

It is an amenable number.

38151945 is a deficient number, since it is larger than the sum of its proper divisors (34894455).

38151945 is a wasteful number, since it uses less digits than its factorization.

38151945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21766 (or 21760 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 38151945 is about 6176.7260745479. The cubic root of 38151945 is about 336.6450459381.

It can be divided in two parts, 381 and 51945, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 38151945 in words is "thirty-eight million, one hundred fifty-one thousand, nine hundred forty-five".