726619890 has 32 divisors (see below), whose sum is σ = 1745556480. Its totient is φ = 193579904.

The previous prime is 726619889. The next prime is 726619897. The reversal of 726619890 is 98916627.

It is a super-2 number, since 2×726619890² = 1055952929087224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726619897) 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, 21871 + ... + 43949.

It is an arithmetic number, because the mean of its divisors is an integer number (54548640).

Almost surely, 2^726619890 is an apocalyptic number.

726619890 is an abundant number, since it is smaller than the sum of its proper divisors (1018936590).

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

726619890 is a wasteful number, since it uses less digits than its factorization.

726619890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23186.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 726619890 is about 26955.8878540478. The cubic root of 726619890 is about 899.0194629712.

The spelling of 726619890 in words is "seven hundred twenty-six million, six hundred nineteen thousand, eight hundred ninety".