142780648 has 8 divisors (see below), whose sum is σ = 267713730. Its totient is φ = 71390320.

The previous prime is 142780643. The next prime is 142780657. The reversal of 142780648 is 846087241.

It can be written as a sum of positive squares in only one way, i.e., 132296004 + 10484644 = 11502^2 + 3238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 142780648.

It is not an unprimeable number, because it can be changed into a prime (142780643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8923783 + ... + 8923798.

Almost surely, 2^142780648 is an apocalyptic number.

It is an amenable number.

142780648 is a deficient number, since it is larger than the sum of its proper divisors (124933082).

142780648 is a wasteful number, since it uses less digits than its factorization.

142780648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17847587 (or 17847583 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 142780648 is about 11949.0856553964. The cubic root of 142780648 is about 522.6646358932.

The spelling of 142780648 in words is "one hundred forty-two million, seven hundred eighty thousand, six hundred forty-eight".