387545890 has 16 divisors (see below), whose sum is σ = 697812408. Its totient is φ = 154967296.

The previous prime is 387545863. The next prime is 387545897. The reversal of 387545890 is 98545783.

It can be written as a sum of positive squares in 4 ways, for example, as 385376161 + 2169729 = 19631^2 + 1473^2 .

It is not an unprimeable number, because it can be changed into a prime (387545897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45834 + ... + 53626.

Almost surely, 2^387545890 is an apocalyptic number.

387545890 is a deficient number, since it is larger than the sum of its proper divisors (310266518).

387545890 is a wasteful number, since it uses less digits than its factorization.

387545890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12773.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 387545890 is about 19686.1852576877. The cubic root of 387545890 is about 729.0786462169.

It can be divided in two parts, 38754 and 5890, that added together give a palindrome (44644).

The spelling of 387545890 in words is "three hundred eighty-seven million, five hundred forty-five thousand, eight hundred ninety".