390428115 has 32 divisors (see below), whose sum is σ = 778830336. Its totient is φ = 162255360.

The previous prime is 390428113. The next prime is 390428119. The reversal of 390428115 is 511824093.

It is not a de Polignac number, because 390428115 - 2¹ = 390428113 is a prime.

It is a super-2 number, since 2×390428115² = 304868225964906450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (390428111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167862 + ... + 170171.

It is an arithmetic number, because the mean of its divisors is an integer number (24338448).

Almost surely, 2^390428115 is an apocalyptic number.

390428115 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

390428115 is a deficient number, since it is larger than the sum of its proper divisors (388402221).

390428115 is a wasteful number, since it uses less digits than its factorization.

390428115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338059.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 390428115 is about 19759.2539079794. The cubic root of 390428115 is about 730.8815989306.

The spelling of 390428115 in words is "three hundred ninety million, four hundred twenty-eight thousand, one hundred fifteen".