38213428 has 12 divisors (see below), whose sum is σ = 72952992. Its totient is φ = 17369720.

The previous prime is 38213423. The next prime is 38213437. The reversal of 38213428 is 82431283.

It is a super-2 number, since 2×38213428² = 2920532159022368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38213428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38213423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434200 + ... + 434287.

It is an arithmetic number, because the mean of its divisors is an integer number (6079416).

Almost surely, 2^38213428 is an apocalyptic number.

It is an amenable number.

38213428 is a deficient number, since it is larger than the sum of its proper divisors (34739564).

38213428 is a wasteful number, since it uses less digits than its factorization.

38213428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868502 (or 868500 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 38213428 is about 6181.7010603878. The cubic root of 38213428 is about 336.8257867352.

The spelling of 38213428 in words is "thirty-eight million, two hundred thirteen thousand, four hundred twenty-eight".