387869890 has 32 divisors (see below), whose sum is σ = 733740480. Its totient is φ = 147438144.

The previous prime is 387869887. The next prime is 387869891. The reversal of 387869890 is 98968783.

It is a super-2 number, since 2×387869890² = 300886103137224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (387869891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3721 + ... + 28099.

It is an arithmetic number, because the mean of its divisors is an integer number (22929390).

Almost surely, 2^387869890 is an apocalyptic number.

387869890 is a deficient number, since it is larger than the sum of its proper divisors (345870590).

387869890 is a wasteful number, since it uses less digits than its factorization.

387869890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24466.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 387869890 is about 19694.4126594321. The cubic root of 387869890 is about 729.2817668353.

The spelling of 387869890 in words is "three hundred eighty-seven million, eight hundred sixty-nine thousand, eight hundred ninety".