730139826 has 24 divisors (see below), whose sum is σ = 1581251760. Its totient is φ = 224658096.

The previous prime is 730139821. The next prime is 730139831. The reversal of 730139826 is 628931037.

It is an interprime number because it is at equal distance from previous prime (730139821) and next prime (730139831).

It is a super-2 number, since 2×730139826² = 1066208331022620552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (730139821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359016 + ... + 361043.

It is an arithmetic number, because the mean of its divisors is an integer number (65885490).

Almost surely, 2^730139826 is an apocalyptic number.

730139826 is an abundant number, since it is smaller than the sum of its proper divisors (851111934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

730139826 is a wasteful number, since it uses less digits than its factorization.

730139826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720090 (or 720077 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 730139826 is about 27021.0996445370. The cubic root of 730139826 is about 900.4688199416.

The spelling of 730139826 in words is "seven hundred thirty million, one hundred thirty-nine thousand, eight hundred twenty-six".