387861858 has 40 divisors (see below), whose sum is σ = 914847120. Its totient is φ = 122481720.

The previous prime is 387861829. The next prime is 387861883. The reversal of 387861858 is 858168783.

It is a happy number.

387861858 is a `hidden beast` number, since 387 + 86 + 185 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59928 + ... + 66083.

It is an arithmetic number, because the mean of its divisors is an integer number (22871178).

Almost surely, 2^387861858 is an apocalyptic number.

387861858 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

387861858 is an abundant number, since it is smaller than the sum of its proper divisors (526985262).

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

387861858 is a wasteful number, since it uses less digits than its factorization.

387861858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126044 (or 126035 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 387861858 is about 19694.2087426736. The cubic root of 387861858 is about 729.2767328177.

The spelling of 387861858 in words is "three hundred eighty-seven million, eight hundred sixty-one thousand, eight hundred fifty-eight".