390190742 has 4 divisors (see below), whose sum is σ = 585286116. Its totient is φ = 195095370.

The previous prime is 390190741. The next prime is 390190763. The reversal of 390190742 is 247091093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247091093 = 23 ⋅10743091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390190741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97547684 + ... + 97547687.

It is an arithmetic number, because the mean of its divisors is an integer number (146321529).

Almost surely, 2^390190742 is an apocalyptic number.

390190742 is a deficient number, since it is larger than the sum of its proper divisors (195095374).

390190742 is a wasteful number, since it uses less digits than its factorization.

390190742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195095373.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 390190742 is about 19753.2463661040. The cubic root of 390190742 is about 730.7334481162.

The spelling of 390190742 in words is "three hundred ninety million, one hundred ninety thousand, seven hundred forty-two".