698644440 has 448 divisors, whose sum is σ = 2699272800. Its totient is φ = 161243136.

The previous prime is 698644439. The next prime is 698644447. The reversal of 698644440 is 44446896.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698644447) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7202472 + ... + 7202568.

Almost surely, 2^698644440 is an apocalyptic number.

698644440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698644440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349636400).

698644440 is an abundant number, since it is smaller than the sum of its proper divisors (2000628360).

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

698644440 is a wasteful number, since it uses less digits than its factorization.

698644440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 698644440 is about 26431.8830203223. The cubic root of 698644440 is about 887.3304851142.

The spelling of 698644440 in words is "six hundred ninety-eight million, six hundred forty-four thousand, four hundred forty".