38420478 has 12 divisors (see below), whose sum is σ = 83244408. Its totient is φ = 12806820.

The previous prime is 38420477. The next prime is 38420491. The reversal of 38420478 is 87402483.

38420478 is a `hidden beast` number, since 384 + 204 + 78 = 666.

It is a super-2 number, since 2×38420478² = 2952266259496968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38420471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1067218 + ... + 1067253.

It is an arithmetic number, because the mean of its divisors is an integer number (6937034).

Almost surely, 2^38420478 is an apocalyptic number.

38420478 is an abundant number, since it is smaller than the sum of its proper divisors (44823930).

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

38420478 is a wasteful number, since it uses less digits than its factorization.

38420478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134479 (or 2134476 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 38420478 is about 6198.4254452240. The cubic root of 38420478 is about 337.4330270401.

The spelling of 38420478 in words is "thirty-eight million, four hundred twenty thousand, four hundred seventy-eight".