2642019840 has 120 divisors (see below), whose sum is σ = 9150137568. Its totient is φ = 704532480.

The previous prime is 2642019833. The next prime is 2642019847. The reversal of 2642019840 is 489102462.

2642019840 is a `hidden beast` number, since 2 + 6 + 420 + 198 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (2642019833) and next prime (2642019847).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2642019795 and 2642019804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642019847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34296 + ... + 80375.

Almost surely, 2^2642019840 is an apocalyptic number.

2642019840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2642019840 is an abundant number, since it is smaller than the sum of its proper divisors (6508117728).

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

2642019840 is a wasteful number, since it uses less digits than its factorization.

2642019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114700 (or 114681 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2642019840 is about 51400.5820978712. The cubic root of 2642019840 is about 1382.4370296151.

The spelling of 2642019840 in words is "two billion, six hundred forty-two million, nineteen thousand, eight hundred forty".