1642427440 has 40 divisors (see below), whose sum is σ = 3881256048. Its totient is φ = 646199040.

The previous prime is 1642427417. The next prime is 1642427483. The reversal of 1642427440 is 447242461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1642427396 and 1642427405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163402 + ... + 173161.

Almost surely, 2^1642427440 is an apocalyptic number.

1642427440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642427440 is an abundant number, since it is smaller than the sum of its proper divisors (2238828608).

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

1642427440 is a wasteful number, since it uses less digits than its factorization.

1642427440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336637 (or 336631 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 1642427440 is about 40526.8730597365. The cubic root of 1642427440 is about 1179.8552537189.

The spelling of 1642427440 in words is "one billion, six hundred forty-two million, four hundred twenty-seven thousand, four hundred forty".