3698007840 has 72 divisors (see below), whose sum is σ = 12619456668. Its totient is φ = 986135040.

The previous prime is 3698007823. The next prime is 3698007851. The reversal of 3698007840 is 487008963.

It is a happy number.

3698007840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3524084496 + 173923344 = 59364^2 + 13188^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1282591 + ... + 1285470.

Almost surely, 2^3698007840 is an apocalyptic number.

3698007840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3698007840 is an abundant number, since it is smaller than the sum of its proper divisors (8921448828).

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

3698007840 is a wasteful number, since it uses less digits than its factorization.

3698007840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568082 (or 2568071 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 3698007840 is about 60811.2476438364. The cubic root of 3698007840 is about 1546.4027352189.

The spelling of 3698007840 in words is "three billion, six hundred ninety-eight million, seven thousand, eight hundred forty".