38509471 has 64 divisors (see below), whose sum is σ = 57286656. Its totient is φ = 24883200.

The previous prime is 38509469. The next prime is 38509481. The reversal of 38509471 is 17490583.

It is a 12-Lehmer number, since φ(38509471) divides (38509471-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 38509471 - 2¹ = 38509469 is a prime.

It is a super-3 number, since 3×38509471³ (a number of 24 digits) contains 333 as substring.

38509471 is a modest number, since divided by 9471 gives 385 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 38509471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38509421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 527491 + ... + 527563.

It is an arithmetic number, because the mean of its divisors is an integer number (895104).

Almost surely, 2^38509471 is an apocalyptic number.

38509471 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38509471 is a deficient number, since it is larger than the sum of its proper divisors (18777185).

38509471 is a wasteful number, since it uses less digits than its factorization.

38509471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 38509471 is about 6205.5999709939. The cubic root of 38509471 is about 337.6933571495.

The spelling of 38509471 in words is "thirty-eight million, five hundred nine thousand, four hundred seventy-one".