1904064789 has 16 divisors (see below), whose sum is σ = 2770536960. Its totient is φ = 1153566960.

The previous prime is 1904064769. The next prime is 1904064809. The reversal of 1904064789 is 9874604091.

It is an interprime number because it is at equal distance from previous prime (1904064769) and next prime (1904064809).

It is not a de Polignac number, because 1904064789 - 2¹³ = 1904056597 is a prime.

It is a super-2 number, since 2×1904064789² = 7250925441419229042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904064749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101832 + ... + 119070.

It is an arithmetic number, because the mean of its divisors is an integer number (173158560).

Almost surely, 2^1904064789 is an apocalyptic number.

It is an amenable number.

1904064789 is a deficient number, since it is larger than the sum of its proper divisors (866472171).

1904064789 is a wasteful number, since it uses less digits than its factorization.

1904064789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20600.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1904064789 is about 43635.5908519640. The cubic root of 1904064789 is about 1239.4449451725. Note that the first 3 decimals are identical.

The spelling of 1904064789 in words is "one billion, nine hundred four million, sixty-four thousand, seven hundred eighty-nine".