38543890 has 48 divisors (see below), whose sum is σ = 88055424. Its totient is φ = 12012000.

The previous prime is 38543851. The next prime is 38543903. The reversal of 38543890 is 9834583.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1815 + ... + 8965.

It is an arithmetic number, because the mean of its divisors is an integer number (1834488).

Almost surely, 2^38543890 is an apocalyptic number.

38543890 is an abundant number, since it is smaller than the sum of its proper divisors (49511534).

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

38543890 is a wasteful number, since it uses less digits than its factorization.

38543890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183 (or 7176 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 38543890 is about 6208.3725725829. The cubic root of 38543890 is about 337.7939350615.

It can be divided in two parts, 3854 and 3890, that added together give a square (7744 = 88²).

The spelling of 38543890 in words is "thirty-eight million, five hundred forty-three thousand, eight hundred ninety".