390077890 has 16 divisors (see below), whose sum is σ = 703264320. Its totient is φ = 155781360.

The previous prime is 390077803. The next prime is 390077893. The reversal of 390077890 is 98770093.

It is not an unprimeable number, because it can be changed into a prime (390077893) 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, 24600 + ... + 37219.

It is an arithmetic number, because the mean of its divisors is an integer number (43954020).

Almost surely, 2^390077890 is an apocalyptic number.

390077890 is a deficient number, since it is larger than the sum of its proper divisors (313186430).

390077890 is a wasteful number, since it uses less digits than its factorization.

390077890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62457.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 390077890 is about 19750.3896164101. The cubic root of 390077890 is about 730.6629931022.

The spelling of 390077890 in words is "three hundred ninety million, seventy-seven thousand, eight hundred ninety".