77250642 has 64 divisors (see below), whose sum is σ = 182939904. Its totient is φ = 21288960.

The previous prime is 77250623. The next prime is 77250643. The reversal of 77250642 is 24605277.

It is not an unprimeable number, because it can be changed into a prime (77250643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194388 + ... + 194784.

It is an arithmetic number, because the mean of its divisors is an integer number (2858436).

Almost surely, 2^77250642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77250642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91469952).

77250642 is an abundant number, since it is smaller than the sum of its proper divisors (105689262).

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

77250642 is a wasteful number, since it uses less digits than its factorization.

77250642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 77250642 is about 8789.2344376516. The cubic root of 77250642 is about 425.8931932638.

The spelling of 77250642 in words is "seventy-seven million, two hundred fifty thousand, six hundred forty-two".