1977050490 has 32 divisors (see below), whose sum is σ = 4747343040. Its totient is φ = 526944384.

The previous prime is 1977050477. The next prime is 1977050497. The reversal of 1977050490 is 940507791.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1977050497) 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, 46897 + ... + 78443.

It is an arithmetic number, because the mean of its divisors is an integer number (148354470).

Almost surely, 2^1977050490 is an apocalyptic number.

1977050490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1977050490 is an abundant number, since it is smaller than the sum of its proper divisors (2770292550).

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

1977050490 is a wasteful number, since it uses less digits than its factorization.

1977050490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33646.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 1977050490 is about 44464.0359166821. The cubic root of 1977050490 is about 1255.0834037152.

The spelling of 1977050490 in words is "one billion, nine hundred seventy-seven million, fifty thousand, four hundred ninety".