1540200642 has 8 divisors (see below), whose sum is σ = 3080401296. Its totient is φ = 513400212.

The previous prime is 1540200637. The next prime is 1540200653. The reversal of 1540200642 is 2460020451.

1540200642 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

1540200642 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128350048 + ... + 128350059.

It is an arithmetic number, because the mean of its divisors is an integer number (385050162).

Almost surely, 2^1540200642 is an apocalyptic number.

1540200642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1540200642 is a wasteful number, since it uses less digits than its factorization.

1540200642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256700112.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1540200642 is about 39245.3900732303. The cubic root of 1540200642 is about 1154.8504999431.

The spelling of 1540200642 in words is "one billion, five hundred forty million, two hundred thousand, six hundred forty-two".