494400309 has 16 divisors (see below), whose sum is σ = 716806272. Its totient is φ = 301290048.

The previous prime is 494400301. The next prime is 494400317. The reversal of 494400309 is 903004494.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (494400301) and next prime (494400317).

It is not a de Polignac number, because 494400309 - 2³ = 494400301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 494400309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494400301) 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, 57522 + ... + 65555.

It is an arithmetic number, because the mean of its divisors is an integer number (44800392).

Almost surely, 2^494400309 is an apocalyptic number.

It is an amenable number.

494400309 is a deficient number, since it is larger than the sum of its proper divisors (222405963).

494400309 is a wasteful number, since it uses less digits than its factorization.

494400309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123196.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 494400309 is about 22235.1143239696. The cubic root of 494400309 is about 790.7264103158.

It can be divided in two parts, 494400 and 309, that multiplied together give a square (152769600 = 12360²).

The spelling of 494400309 in words is "four hundred ninety-four million, four hundred thousand, three hundred nine".