38409720 has 32 divisors (see below), whose sum is σ = 115229520. Its totient is φ = 10242560.

The previous prime is 38409689. The next prime is 38409727. The reversal of 38409720 is 2790483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38409727) 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, 159921 + ... + 160160.

Almost surely, 2^38409720 is an apocalyptic number.

38409720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38409720 is an abundant number, since it is smaller than the sum of its proper divisors (76819800).

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

38409720 is a wasteful number, since it uses less digits than its factorization.

38409720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320095 (or 320091 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 38409720 is about 6197.5575834356. The cubic root of 38409720 is about 337.4015295717.

The spelling of 38409720 in words is "thirty-eight million, four hundred nine thousand, seven hundred twenty".