390032490 has 32 divisors (see below), whose sum is σ = 936619200. Its totient is φ = 103948544.

The previous prime is 390032473. The next prime is 390032491. The reversal of 390032490 is 94230093.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390032491) 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, 78562 + ... + 83378.

It is an arithmetic number, because the mean of its divisors is an integer number (29269350).

Almost surely, 2^390032490 is an apocalyptic number.

390032490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

390032490 is an abundant number, since it is smaller than the sum of its proper divisors (546586710).

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

390032490 is a wasteful number, since it uses less digits than its factorization.

390032490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 390032490 is about 19749.2402385510. The cubic root of 390032490 is about 730.6346454416.

The spelling of 390032490 in words is "three hundred ninety million, thirty-two thousand, four hundred ninety".