387040340 has 12 divisors (see below), whose sum is σ = 812784756. Its totient is φ = 154816128.

The previous prime is 387040333. The next prime is 387040349. The reversal of 387040340 is 43040783.

It can be written as a sum of positive squares in 2 ways, for example, as 96746896 + 290293444 = 9836^2 + 17038^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387040349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9675989 + ... + 9676028.

It is an arithmetic number, because the mean of its divisors is an integer number (67732063).

Almost surely, 2^387040340 is an apocalyptic number.

It is an amenable number.

387040340 is an abundant number, since it is smaller than the sum of its proper divisors (425744416).

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

387040340 is a wasteful number, since it uses less digits than its factorization.

387040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19352026 (or 19352024 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 387040340 is about 19673.3408449099. The cubic root of 387040340 is about 728.7614828326.

The spelling of 387040340 in words is "three hundred eighty-seven million, forty thousand, three hundred forty".