38997951 has 8 divisors (see below), whose sum is σ = 52200624. Its totient is φ = 25896960.

The previous prime is 38997943. The next prime is 38997991. The reversal of 38997951 is 15979983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38997951 - 2³ = 38997943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38997894 and 38997903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38997901) 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, 24520 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (6525078).

Almost surely, 2^38997951 is an apocalyptic number.

38997951 is a deficient number, since it is larger than the sum of its proper divisors (13202673).

38997951 is a wasteful number, since it uses less digits than its factorization.

38997951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50841.

The product of its digits is 612360, while the sum is 51.

The square root of 38997951 is about 6244.8339449500. The cubic root of 38997951 is about 339.1152052297.

The spelling of 38997951 in words is "thirty-eight million, nine hundred ninety-seven thousand, nine hundred fifty-one".