390019240 has 32 divisors (see below), whose sum is σ = 945047880. Its totient is φ = 144006912.

The previous prime is 390019237. The next prime is 390019291. The reversal of 390019240 is 42910093.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 360924004 + 29095236 = 18998^2 + 5394^2 .

It is a super-3 number, since 3×390019240³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 390019199 and 390019208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374499 + ... + 375538.

Almost surely, 2^390019240 is an apocalyptic number.

It is an amenable number.

390019240 is an abundant number, since it is smaller than the sum of its proper divisors (555028640).

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

390019240 is a wasteful number, since it uses less digits than its factorization.

390019240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750061 (or 750057 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 390019240 is about 19748.9047797593. The cubic root of 390019240 is about 730.6263717559.

The spelling of 390019240 in words is "three hundred ninety million, nineteen thousand, two hundred forty".