732428639 has 2 divisors, whose sum is σ = 732428640. Its totient is φ = 732428638.

The previous prime is 732428623. The next prime is 732428681. The reversal of 732428639 is 936824237.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 732428639 - 2⁴ = 732428623 is a prime.

It is a super-2 number, since 2×732428639² = 1072903422454784642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 732428639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (732428689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 366214319 + 366214320.

It is an arithmetic number, because the mean of its divisors is an integer number (366214320).

Almost surely, 2^732428639 is an apocalyptic number.

732428639 is a deficient number, since it is larger than the sum of its proper divisors (1).

732428639 is an equidigital number, since it uses as much as digits as its factorization.

732428639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 44.

The square root of 732428639 is about 27063.4188342863. The cubic root of 732428639 is about 901.4087562961.

The spelling of 732428639 in words is "seven hundred thirty-two million, four hundred twenty-eight thousand, six hundred thirty-nine".