387021945 has 16 divisors (see below), whose sum is σ = 626697792. Its totient is φ = 203924160.

The previous prime is 387021937. The next prime is 387021979. The reversal of 387021945 is 549120783.

It is not a de Polignac number, because 387021945 - 2³ = 387021937 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154186 + ... + 156675.

It is an arithmetic number, because the mean of its divisors is an integer number (39168612).

Almost surely, 2^387021945 is an apocalyptic number.

It is an amenable number.

387021945 is a deficient number, since it is larger than the sum of its proper divisors (239675847).

387021945 is a wasteful number, since it uses less digits than its factorization.

387021945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310952.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 387021945 is about 19672.8733285202. The cubic root of 387021945 is about 728.7499372834.

The spelling of 387021945 in words is "three hundred eighty-seven million, twenty-one thousand, nine hundred forty-five".