77072250 has 32 divisors (see below), whose sum is σ = 192374208. Its totient is φ = 20552400.

The previous prime is 77072249. The next prime is 77072257. The reversal of 77072250 is 5227077.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (77072257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50632 + ... + 52131.

It is an arithmetic number, because the mean of its divisors is an integer number (6011694).

Almost surely, 2^77072250 is an apocalyptic number.

77072250 is an abundant number, since it is smaller than the sum of its proper divisors (115301958).

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

77072250 is a wasteful number, since it uses less digits than its factorization.

77072250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102783 (or 102773 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 30.

The square root of 77072250 is about 8779.0802479531. The cubic root of 77072250 is about 425.5651075482.

The spelling of 77072250 in words is "seventy-seven million, seventy-two thousand, two hundred fifty".