3278499840 has 936 divisors, whose sum is σ = 14903033040. Its totient is φ = 681246720.

The previous prime is 3278499823. The next prime is 3278499857. The reversal of 3278499840 is 489948723.

3278499840 is a `hidden beast` number, since 3 + 2 + 78 + 499 + 84 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (3278499823) and next prime (3278499857).

It is a super-2 number, since 2×3278499840² = 21497122401760051200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 298045435 + ... + 298045445.

Almost surely, 2^3278499840 is an apocalyptic number.

3278499840 is a gapful number since it is divisible by the number (30) 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 3278499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7451516520).

3278499840 is an abundant number, since it is smaller than the sum of its proper divisors (11624533200).

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

3278499840 is a wasteful number, since it uses less digits than its factorization.

3278499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 3278499840 is about 57258.1857903305. The cubic root of 3278499840 is about 1485.5652169400.

The spelling of 3278499840 in words is "three billion, two hundred seventy-eight million, four hundred ninety-nine thousand, eight hundred forty".