390401500 has 24 divisors (see below), whose sum is σ = 852637968. Its totient is φ = 156160400.

The previous prime is 390401491. The next prime is 390401503. The reversal of 390401500 is 5104093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390401503) 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, 389902 + ... + 390901.

It is an arithmetic number, because the mean of its divisors is an integer number (35526582).

Almost surely, 2^390401500 is an apocalyptic number.

It is an amenable number.

390401500 is an abundant number, since it is smaller than the sum of its proper divisors (462236468).

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

390401500 is a wasteful number, since it uses less digits than its factorization.

390401500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780822 (or 780810 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 390401500 is about 19758.5804145946. The cubic root of 390401500 is about 730.8649907894.

Adding to 390401500 its reverse (5104093), we get a palindrome (395505593).

The spelling of 390401500 in words is "three hundred ninety million, four hundred one thousand, five hundred".