775369140 has 144 divisors (see below), whose sum is σ = 2719890432. Its totient is φ = 163586304.

The previous prime is 775369139. The next prime is 775369159. The reversal of 775369140 is 41963577.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 775369092 and 775369101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28077 + ... + 48363.

It is an arithmetic number, because the mean of its divisors is an integer number (18888128).

Almost surely, 2^775369140 is an apocalyptic number.

775369140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775369140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1359945216).

775369140 is an abundant number, since it is smaller than the sum of its proper divisors (1944521292).

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

775369140 is a wasteful number, since it uses less digits than its factorization.

775369140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20326 (or 20317 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 775369140 is about 27845.4509749797. The cubic root of 775369140 is about 918.6910891932.

The spelling of 775369140 in words is "seven hundred seventy-five million, three hundred sixty-nine thousand, one hundred forty".