726623642 has 8 divisors (see below), whose sum is σ = 1098518016. Its totient is φ = 360450972.

The previous prime is 726623549. The next prime is 726623647. The reversal of 726623642 is 246326627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×726623642² = 1055963834226688328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 726623596 and 726623605.

It is not an unprimeable number, because it can be changed into a prime (726623647) 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 3 ways as a sum of consecutive naturals, for example, 1430108 + ... + 1430615.

It is an arithmetic number, because the mean of its divisors is an integer number (137314752).

Almost surely, 2^726623642 is an apocalyptic number.

726623642 is a deficient number, since it is larger than the sum of its proper divisors (371894374).

726623642 is a wasteful number, since it uses less digits than its factorization.

726623642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860852.

The product of its digits is 145152, while the sum is 38.

The square root of 726623642 is about 26955.9574491429. The cubic root of 726623642 is about 899.0210103714.

The spelling of 726623642 in words is "seven hundred twenty-six million, six hundred twenty-three thousand, six hundred forty-two".