390054781 has 8 divisors (see below), whose sum is σ = 412397280. Its totient is φ = 367893648.

The previous prime is 390054779. The next prime is 390054787. The reversal of 390054781 is 187450093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390054781 - 2¹ = 390054779 is a prime.

It is a super-2 number, since 2×390054781² = 304285464361915922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 390054781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390054787) 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, 40906 + ... + 49531.

It is an arithmetic number, because the mean of its divisors is an integer number (51549660).

Almost surely, 2^390054781 is an apocalyptic number.

It is an amenable number.

390054781 is a deficient number, since it is larger than the sum of its proper divisors (22342499).

390054781 is a wasteful number, since it uses less digits than its factorization.

390054781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90683.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 390054781 is about 19749.8045813117. The cubic root of 390054781 is about 730.6485641681.

The spelling of 390054781 in words is "three hundred ninety million, fifty-four thousand, seven hundred eighty-one".